NAME

V6LC_2_2_4_E - Router Ignores Invalid Router Solicitations (Option has length 0)

TARGET

Router

TOPOLOGY

            |
   TN1     RUT
    |       |
----+-------+--- Link0

Link0	global	3ffe:501:ffff:100::/64
	link-local	fe80::/64
RUT	global	3ffe:501:ffff:100::<NutDef.Link0_addr>
	link-local	fe80::<NutDef.Link0_addr>
	ether	<NutDef.Link0_addr>
TN1	global	3ffe:501:ffff:100::<TnDef.Link0_addr>
	link-local	fe80::<TnDef.Link0_addr>
	ether	<TnDef.Link0_addr>

SETUP

none

TEST PROCEDURE

- Verify that a router ignores invalid Router Solicitations.

   TN1     RUT
    |       |
    |       * Configure Interface A on the RUT to be an advertising interface.
    |       |
    |   <-- | RA (multicast)
    |   <-- | RA (multicast)
    |   <-- | RA (multicast)
    |       |
    | -->   | RS (multicast)
    |   X-- | no response [Judgment #1]
    |       |
    V       V

1. Configure Interface A on the RUT to be an advertising interface.

2. Observe RA

        RA message format #1
            IPv6 header
                hop limit          = 255
                source             = RUT (link-local)
                destination        = all-nodes multicast address
            RA
                cur hop limit      = 64
                M                  = 0
                O                  = 0
                router lifetime    = 1800
                reachable time     = 0
                retrans timer      = 0
            SLL option
            Prefix Information option
                prefix length      = 64
                L                  = 1
                A                  = 1
                valid Lifetime     = 2592000
                preferred lifetime = 604800
                prefix             = 3ffe:501:ffff:100::

        RA message format #2
            IPv6 header
                hop limit          = 255
                source             = RUT (link-local)
                destination        = all-nodes multicast address
            RA
                cur hop limit      = 64
                M                  = 0
                O                  = 0
                router lifetime    = 1800
                reachable time     = 0
                retrans timer      = 0
            Prefix Information option
                prefix length      = 64
                L                  = 1
                A                  = 1
                valid Lifetime     = 2592000
                preferred lifetime = 604800
                prefix             = 3ffe:501:ffff:100::

3. Send RS

        IPv6 header
            source      = unspecified address
            destination = all-routers multicast address
        RS
        XXX option
            type        = 255
            length      = 0

4. no response

JUDGEMENT

[Judgment #1] The RUT must discard the Router Solicitation from TN1 and must not transmit a corresponding Router Advertisement within MAX_RA_DELAY_TIME (0.5) seconds.

CLEANUP

The Cleanup procedure should cause the NUT to transition Neighbor Cache entries created in this test to state INCOMPLETE and remove any entries from its Default Router and Prefix Lists.

   TN1     RUT
    |       |
    |       * Ceasing to be an advertising interface
    |       |
    |   <-- | RA (multicast)
    |   <-- | RA (multicast)
    |   <-- | RA (multicast)
    |       |
    V       V

1. Ceasing to be an advertising interface

2. Observe RA

        RA message format #1
            IPv6 header
                hop limit          = 255
                source             = RUT (link-local)
                destination        = all-nodes multicast address
            RA
                cur hop limit      = 64
                M                  = 0
                O                  = 0
                router lifetime    = 0
                reachable time     = 0
                retrans timer      = 0
            SLL option
            Prefix Information option
                prefix length      = 64
                L                  = 1
                A                  = 1
                valid Lifetime     = 2592000
                preferred lifetime = 604800
                prefix             = 3ffe:501:ffff:100::

        RA message format #2
            IPv6 header
                hop limit          = 255
                source             = RUT (link-local)
                destination        = all-nodes multicast address
            RA
                cur hop limit      = 64
                M                  = 0
                O                  = 0
                router lifetime    = 0
                reachable time     = 0
                retrans timer      = 0
            Prefix Information option
                prefix length      = 64
                L                  = 1
                A                  = 1
                valid Lifetime     = 2592000
                preferred lifetime = 604800
                prefix             = 3ffe:501:ffff:100::

REFERENCE

RFC 2461 - Neighbor Discovery for IPv6